短语词组短语optical purity ibutilide 旋光纯伊布利特enantiomer and optical purity 对映体和光学纯度high optical purity 高光学纯度Percent optical purity 光学纯度百分率optical purity analysis 光学纯度检验high -purity optical fiber 高纯光纤 返回 optical purity